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PGS subtitles: Expose forced flag

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Useful for detection of subtitles displayed during foreign language
scenes.

Signed-off-by: Diego Biurrun <diego@biurrun.de>
This commit is contained in:
John Stebbins 2012-10-20 09:56:11 -07:00 committed by Diego Biurrun
parent 26f01bd106
commit 85f67c4865
3 changed files with 12 additions and 4 deletions
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3
libavcodec/avcodec.h
View File

@ -3166,6 +3166,8 @@ enum AVSubtitleType {
SUBTITLE_ASS,
};
#define AV_SUBTITLE_FLAG_FORCED 0x00000001
typedef struct AVSubtitleRect {
int x; ///< top left corner of pict, undefined when pict is not set
int y; ///< top left corner of pict, undefined when pict is not set
@ -3188,6 +3190,7 @@ typedef struct AVSubtitleRect {
* struct.
*/
char *ass;
int flags;
} AVSubtitleRect;
typedef struct AVSubtitle {

11
libavcodec/pgssubdec.c
View File

@ -45,6 +45,7 @@ typedef struct PGSSubPresentation {
int y;
int id_number;
int object_number;
uint8_t composition_flag;
} PGSSubPresentation;
typedef struct PGSSubPicture {
@ -299,16 +300,17 @@ static void parse_presentation_segment(AVCodecContext *avctx,
buf += 3;
ctx->presentation.object_number = bytestream_get_byte(&buf);
ctx->presentation.composition_flag = 0;
if (!ctx->presentation.object_number)
return;
/*
* Skip 4 bytes of unknown:
* Skip 3 bytes of unknown:
* object_id_ref (2 bytes),
* window_id_ref,
* composition_flag (0x80 - object cropped, 0x40 - object forced)
*/
buf += 4;
buf += 3;
ctx->presentation.composition_flag = bytestream_get_byte(&buf);
x = bytestream_get_be16(&buf);
y = bytestream_get_be16(&buf);
@ -368,6 +370,9 @@ static int display_end_segment(AVCodecContext *avctx, void *data,
sub->rects[0] = av_mallocz(sizeof(*sub->rects[0]));
sub->num_rects = 1;
if (ctx->presentation.composition_flag & 0x40)
sub->rects[0]->flags |= AV_SUBTITLE_FLAG_FORCED;
sub->rects[0]->x = ctx->presentation.x;
sub->rects[0]->y = ctx->presentation.y;
sub->rects[0]->w = ctx->picture.w;

2
libavcodec/version.h
View File

@ -27,7 +27,7 @@
*/
#define LIBAVCODEC_VERSION_MAJOR 54
#define LIBAVCODEC_VERSION_MINOR 32
#define LIBAVCODEC_VERSION_MINOR 33
#define LIBAVCODEC_VERSION_MICRO 0
#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \